20004984 has 24 divisors (see below), whose sum is σ = 54180360. Its totient is φ = 6668304.

The previous prime is 20004979. The next prime is 20004997. The reversal of 20004984 is 48940002.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 138852 + ... + 138995.

It is an arithmetic number, because the mean of its divisors is an integer number (2257515).

Almost surely, 2^20004984 is an apocalyptic number.

20004984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20004984 is an abundant number, since it is smaller than the sum of its proper divisors (34175376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20004984 is a wasteful number, since it uses less digits than its factorization.

20004984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277859 (or 277852 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 20004984 is about 4472.6931484286. The cubic root of 20004984 is about 271.4643075491.

Adding to 20004984 its reverse (48940002), we get a palindrome (68944986).

The spelling of 20004984 in words is "twenty million, four thousand, nine hundred eighty-four".